Answer:
D) can access main memory at the same time as the main CPU
Explanation:
DMA is short for Direct Memory Access, these controllers allow the device to transfer data directly to and from the memory modules without interfering with CPU processes. Therefore it can access main memory at the same time as the main CPU. Thus freeing up CPU processing power for other tasks while also retrieving the data necessary.
I think the answer is
3 - Usually, but we may need to convert the data types (date to text)
Because we can change the format, but depends of the original format type and in what type you need to format.
I think this can help.
B. Sound.
Explanation - instruments create sound waves
Try to see a computer specialist to help
